CN104755214B - Wire discharge processing apparatus - Google Patents
Wire discharge processing apparatus Download PDFInfo
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- CN104755214B CN104755214B CN201280076579.9A CN201280076579A CN104755214B CN 104755214 B CN104755214 B CN 104755214B CN 201280076579 A CN201280076579 A CN 201280076579A CN 104755214 B CN104755214 B CN 104755214B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention carries out in the wire discharge processing apparatus of electro-discharge machining pre-arcing and main discharge are repeated, the 3rd DC pulse voltage is applied in during resting, pre-arcing thereafter can be induced at short notice, thus increase discharge frequency, improve process velocity.The on/off action control of switch portion is by control portion, the first DC pulse voltage is applied to interpolar from the pulse voltage generating unit being adjusted to the first impedance, in the case of being detected pre-arcing by test section, the second DC pulse voltage is applied from the described pulse voltage generating unit being adjusted to the second impedance lower than described first impedance to described interpolar in order to produce main discharge at described interpolar, rest in period terminating to play from main discharge till next pre-arcing starts, it is applied more than to described interpolar or equal to the 3rd DC pulse voltage of electrical discharge arc voltage from being adjusted to the described pulse voltage generating unit of the 3rd impedance higher than described first impedance.
Description
Technical field
The present invention relates to a kind of wire discharge processing apparatus.
Background technology
Having in electric discharge device described in patent document 1, for executing in processing gap
Each the processing pulse added, utilizes at its initial stage and checks that pulse carrys out detector gap state.Specifically
Ground is said, checks that pulse-generating circuit makes in delay from the connection commencing signal outputing switch
After voltage across poles becomes the time of voltage that be enough to discharge, produce and check pulse.Gap state is sentenced
Other circuit, only during checking the generation of pulse, compares detection voltage and the benchmark electricity in processing gap
Pressure, it determines whether sustained arc electric discharge, short circuit occur, and these are abnormal.Thus, according to patent literary composition
Offer 1, occur sustained arc electric discharge, short circuit these abnormal in the case of remove that these are abnormal,
Produce regular picture the most at short notice, it is thus possible to improve the frequency of regular picture, it is possible to
Increase process velocity.
Having in electric discharge device described in patent document 2, only stopping applying pulse
Voltage rest period in interpolar apply alternating voltage, detect interpolar exist insulating properties add
The insulativity of work liquid.Thus, according to patent document 2, do not detect and concentrated reason by also absence of discharge
The insulativity that causes of electric field metal ion deteriorate, detect real electric discharge and concentrate reason, should
Testing result, compared with a reference value, carries out the anomalous discrimination of interpolar, enters when being determined as exception
Row controls to recover the state of interpolar, because of without reducing process velocity.
Having in electric discharge device described in patent document 3, in roughing and finishing
Between arrange rest period, this roughing is to turn on roughing power supply, to load portion apply processing
Voltage and carry out cutting processing, this finishing be to turn on high frequency finishing power supply, load portion is executed
Add machining voltage and carry out Surface Finishing.Thus, according to patent document 3, it is possible to make processing
Interelectrode impedance rest period in recover after between machined electrode apply voltage, it is possible to height
Efficient it is processed.
Patent document 1: Japanese Laid-Open Patent Publication 61-293717 publication
Patent document 2: Japanese Laid-Open Patent Publication 62-287917 publication
Patent document 3: Japanese Unexamined Patent Publication 2001-157921 publication
Summary of the invention
On the other hand, put at line electrode pre-arcing and main discharge being repeated and constantly process
In electric machining, between the pulse voltage and the pulse voltage of pre-arcing of main discharge, arrange
For making the arc current caused by main discharge pulse voltage decay recover electrode insulation
Rest period.If this rests period and falls short of, then caused by main discharge pulse voltage
Applying pre-arcing pulse voltage before arc current complete attenuation, arc current does not likely have
Cut off but constant flow halfway.Rest period accordingly, it would be desirable to arrange with sufficiently long length.
In patent document 1, there is no any record relevant to pre-arcing, about how to carry
Process velocity when height is repeated pre-arcing and main discharge and carries out electro-discharge machining, does not the most appoint
What is recorded.
It addition, in the technology that patent document 1 is recorded, become at voltage across poles and be enough to discharge
Voltage after, only for detection discharge condition and produce inspection pulse, it is contemplated that check arteries and veins
Rush self not induced discharge, it is difficult to improve discharge frequency, it is difficult to improve process velocity.
In patent document 2, there is no any record relevant to pre-arcing, about how to carry
Process velocity when height is repeated pre-arcing and main discharge and carries out electro-discharge machining, does not the most appoint
What is recorded.
It addition, in the technology that patent document 2 is recorded, stopping stopping of applying pulse voltage
In off period, apply alternating current only for the insulativity of detection insulating properties working fluid at interpolar
Pressure, it is contemplated that alternating voltage self not induced discharge, it is difficult to improve discharge frequency, it is difficult to
Improve process velocity.
In patent document 3, there is no any record relevant to pre-arcing, about how to improve
Process velocity when pre-arcing and main discharge are repeated and carry out electro-discharge machining, the most any
Record.
It addition, in the technology that patent document 3 is recorded, processing electricity in during resting
Premised on interpolar does not applies voltage, it is difficult to improve discharge frequency, it is difficult to improve process velocity.
The present invention proposes in view of the foregoing, its object is to obtain a kind of line electrode
Electric discharge device, it can improve and pre-arcing and main discharge is repeated and carries out electro-discharge machining
Time process velocity.
In order to solve above-mentioned problem and realize purpose, involved by a technical scheme of the present invention
Wire discharge processing apparatus be characterised by possessing: pulse voltage generating unit, it has
Multiple power supplys, producing should the DC-pulse that applies of interpolar between line electrode and machined object
Pressure；Switch portion, it selects power supply to adjust described pulse voltage and produce from the plurality of power supply
The impedance in portion, on/off applies from selected power supply to the voltage of described interpolar；Detection
Portion, it detects the discharge condition of described interpolar；And control portion, it connects described switch portion
On/off opens action control, from being adjusted to the described pulse voltage generating unit of the first impedance to institute
State interpolar and apply the first DC pulse voltage, apply described first DC pulse to described interpolar
In the case of being detected pre-arcing by described test section after voltage, main in order to produce at described interpolar
Electric discharge and produce from the described pulse voltage being adjusted to the second impedance lower than described first impedance
Portion applies the second DC pulse voltage to described interpolar, from described second DC pulse voltage knot
Do up and rest in period, from adjustment till next described first DC pulse voltage starts
For the described pulse voltage generating unit of threeth impedance higher than described first impedance to described interpolar
It is applied more than or is equal to the 3rd DC pulse voltage of electrical discharge arc voltage.
The effect of invention
In accordance with the invention it is possible to the applying of the 3rd DC pulse voltage in during passing through to rest,
Before applying the first DC pulse voltage, interpolar is charged to more than or equal to arc potential, or
By the weak discharge by the 3rd DC pulse voltage generation, the state of interpolar can be kept
Be stable, it is thus possible to induce the most at short notice by the first DC pulse voltage cause pre-
Electric discharge, by increasing capacitance it is possible to increase discharge frequency.It is as a result, it is possible to raising is repeated pre-arcing and master is put
Electricity and process velocity when carrying out electro-discharge machining.
Accompanying drawing explanation
Fig. 1 is the structure representing the wire discharge processing apparatus involved by embodiment 1
Figure.
Fig. 2 is the action representing the wire discharge processing apparatus involved by embodiment 1
Figure.
Fig. 3 is the structure representing the wire discharge processing apparatus involved by embodiment 2
Figure.
Fig. 4 is the action representing the wire discharge processing apparatus involved by embodiment 2
Figure.
Detailed description of the invention
Below, based on accompanying drawing, the reality to wire discharge processing apparatus involved in the present invention
The mode of executing is described in detail.Additionally, the present invention is not limited to present embodiment.
Embodiment 1
Use Fig. 1 that the wire discharge processing apparatus 1 involved by embodiment 1 is described.Fig. 1
It it is the figure of the structure representing wire discharge processing apparatus 1.
Wire discharge processing apparatus 1 is by the pole between line electrode E and machined object W
Between GP produce arc discharge, machined object W is processed (such as melt cut).
Specifically, wire discharge processing apparatus 1 applies the of pre-arcing at interpolar GP
One DC pulse voltage V1 and after producing arc discharge, apply straight with first at interpolar GP
Flow the second DC pulse voltage V2 of the different main discharge of pulse voltage V1 and make electric arc put
Electricity development, forms the arc current of short pulse, peak value, utilizes the heat now produced to being added
Work thing W is processed (such as melt cut).That is, wire discharge processing apparatus 1 is anti-
Reestablish diplomatic relations and alternately carry out pre-arcing and main discharge and constantly process.
Now, first straight in the second DC pulse voltage V2 of main discharge and pre-arcing
Between stream pulse voltage V1, need for making by the second DC pulse voltage of main discharge
The arc current that V2 causes is decayed and is recovered the period of the insulation of interpolar GP.Hereinafter, will be from
The applying of the second DC pulse voltage V2 of this main discharge terminates to play next first direct current
The applying of pulse voltage V1 start till period, be referred to as resting period Tid.
If this rests period, Tid falls short of, then by the second DC pulse of main discharge
The first DC pulse of pre-arcing is applied before the arc current complete attenuation that voltage V2 causes
Voltage V1, arc current is not cut off but constant flow the most halfway.From processing speed
From the viewpoint of degree, make arc current constant flow increase produced heat, make processed
Thing W is melted, and to increase this way be effective, but isochrone electrode E is also melted and wear and tear,
If heat is excessive, line electrode E breaks, and working (machining) efficiency can be caused on the contrary to reduce.Therefore,
It is set to sufficiently long length during needing to rest.
Assume period Tid not to carry out any electric discharge resting, then will rest period Tid
In the case of being set to sufficiently long length, it is difficult to improve discharge frequency, it is difficult to improve process velocity.
To this, in the present embodiment, carry out following control, produce faint electric discharge,
Thus improving discharge frequency and improve process velocity, above-mentioned control refers to, is resting period Tid
In, the power suppression of arc current (electric current of interpolar GP) is not broken for line electrode E
Degree, and increase the number of times making arc current flow.
Specifically, wire discharge processing apparatus 1 possess line electrode E, machined object W,
Pulse voltage generating unit 10, switch portion 20, test section 30 and control portion 40.
Pulse voltage generating unit 10 produces should pole between line electrode E and machined object W
Between GP apply DC pulse voltage.Pulse voltage generating unit 10 is configured to have multiple electricity
Source, it is possible to adjust impedance according to which power supply selected in multiple power supplys.
Such as, pulse voltage generating unit 10 have the first power supply 11, second source 12, with
And the 3rd power supply 13.First power supply 11 has the first impedance.Such as, the first power supply 11 has
There is the resistive element R1 of dc source V1 and the resistance value corresponding with the first impedance.Resistance unit
Part R1 is arranged on from dc source V1 to the current path of interpolar GP, limit from direct current
Power supply V1 flows to the electric current of interpolar GP.
Second source 12 has second impedance lower than the first impedance.Such as, second source 12
There is dc source V2, but not there is resistive element, thus have only by circuit structures such as electric wires
The second impedance become.In second source 12, from dc source V2 to the electricity of interpolar GP
Not there is on flow path resistive element, thus compared with the first power supply 11 and the 3rd power supply 13,
Can make that the rise time is short, the current direction interpolar GP of peak value.
3rd power supply 13 has threeth impedance higher than the first impedance.3rd impedance ratio first hinders
Anti-height, thus also high than the second impedance.Such as, the 3rd power supply 13 has dc source V3
And the resistive element R3 of the resistance value corresponding with the 3rd impedance.Such as, in order to corresponding to the 3rd
Impedance ratio the first impedance this situation high, the resistance value of resistive element R3 is than resistive element R1
Resistance value high.Resistive element R3 is arranged on from dc source V3 to the electric current of interpolar GP
On path, limit the electric current flowing to interpolar GP from dc source V3.
Switch portion 20 selects power supply, pulse voltage generating unit 10 from multiple power supplys 11～13
Impedance be adjusted.Such as, switch portion 20 is by selecting the first power supply 11, thus by arteries and veins
The impedance rushing voltage generation part 10 is adjusted to the first impedance.Or, such as, switch portion 20
By selecting second source 12, thus the impedance of pulse voltage generating unit 10 is adjusted to second
Impedance.Or, such as, switch portion 20 by select the 3rd power supply 13, thus by pulse electricity
The impedance of pressure generating unit 10 is adjusted to the 3rd impedance.
Execute it addition, switch portion 20 turns on/off from selected power supply to the voltage of interpolar GP
Add.Such as, switch portion 20 has multiple switch portion, and the plurality of switch portion is for by multiple electricity
Source 11～13 is connected in parallel with interpolar GP the most independently of each other.
Such as, switch portion 20 has the first switch portion 21, second switch portion 22, Yi Ji
Three switch portion 23.First switch portion 21 is arranged between the first power supply 11 and interpolar GP, connects
On/off is opened and is applied from the first power supply 11 to the voltage of interpolar GP.Such as, the first switch portion 21
There is switch element S11, S12.Switch element S11 such as makes the first power supply 11 with processed
Electrically conducting or cut-out between thing W.Switch element S12 such as makes the first power supply 11 and line electricity
Electrically conducting or cut-out between the E of pole.
Second switch portion 22 is arranged between second source 12 and interpolar GP, on/off
Apply from second source 12 to the voltage of interpolar GP.Such as, second switch portion 22 has out
Close element S21, S22.Switch element S21 such as makes second source 12 and machined object W
Between electrically conducting or cut-out.Switch element S22 such as makes second source 12 and line electrode E
Between electrically conducting or cut-out.
3rd switch portion 23 is arranged between the 3rd power supply 13 and interpolar GP, on/off
Apply from the 3rd power supply 13 to the voltage of interpolar GP.Such as, the 3rd switch portion 23 has out
Close element S31, S32.Switch element S31 such as makes the 3rd power supply 13 and machined object W
Between electrically conducting or cut-out.Switch element S32 such as makes the 3rd power supply 13 and line electrode E
Between electrically conducting or cut-out.
Discharge condition in interpolar GP is detected by test section 30.Such as, test section 30
It is connected in parallel with interpolar GP, the voltage of interpolar GP is monitored, it is judged that the pole monitored
Between the voltage of GP whether higher than a reference value, by comparative result (such as, in the case of height be
The signal of H level, is the signal of L level in the case of low) as representing with or without generation
Electric discharge information and be transferred to control portion 40.
Control portion 40 is based on the information from test section 30, the switch element to switch portion 20
The on/off of S11～S32 instructs, and controls the vibration that device is overall.
Then, use Fig. 2 that the action of wire discharge processing apparatus 1 is described.Fig. 2 is table
Show the figure of the action of wire discharge processing apparatus 1.
Such as, in timing t 1 when processing starts, control portion 40 connects the first switch portion 21
Switch element S11, S12, apply the first DC-pulse from the first power supply 11 to interpolar GP
Pressure V1.
In timing t 2, if the insulation of interpolar GP is destroyed and pre-arcing occurs, then by examining
Survey portion 30 detects the generation of electric discharge, thus control portion 40 disconnects opening of the first switch portion 21
Close element S11, S12, during arc current continues, connect opening of second switch portion 22
Close element S21, S22, apply the second DC pulse voltage from second source 12 to interpolar GP
V2, makes the current direction interpolar GP bigger than the arc current caused by arc discharge, to quilt
Machining object W carries out melt-processed.Additionally, the time width of the second DC pulse voltage V2
Machining state according to interpolar GP is set.
When timing t 3, according to the instruction from control portion 40, disconnect second switch portion 22
Switch element S21, S22, the electric arc thus caused by the second DC pulse voltage V2 electricity
Stream welcomes peak value, and subsequently, the second DC pulse voltage V2 the arc current caused is at certain
Decay in degree.From this timing t 3, start to rest period Tid.
Then, in the timing t 4 rested in period Tid, control portion 40 connects the 3rd switch portion
Switch element S31, S32 of 23, from the 3rd power supply 13 to become more than or equal to electric arc electricity
The mode of pressure Vark applies the 3rd DC pulse voltage V3.Arc voltage Vark is interpolar GP
Insulation is destroyed and voltage across poles when there is electric discharge, in order to destroy the insulation of interpolar GP,
Need the voltage more than or equal to arc voltage.Such as, if machined object W is ferrous materials,
Then arc voltage is about 20V.The time width of the 3rd DC pulse voltage V3 is set to and the
The time corresponding to time width that sets of two DC pulse voltage V2, i.e. with tight before electric arc
The time that the size of electric current is corresponding.Amplitude ratio the first direct current arteries and veins of the 3rd DC pulse voltage V3
The amplitude rushing the amplitude of voltage V1 and the second DC pulse voltage V2 is little, it is thus possible to broken
Badly insulate and faint electric discharge occurs, it is possible to by putting of considering to be worth doing with the processing being detained at interpolar GP
Electricity removes processing bits.It addition, by cutter trade recessed removing machined object W surface
Convex injustice, thus interpolar GP is set to stable state, it is possible to induce immediately after by
The pre-arcing that first DC pulse voltage V1 causes, it is possible to realize the raising i.e. height of discharge frequency
Speed processing.
Additionally, the distance of interpolar GP is controlled by numerical control device or servo drive control device,
To produce electric discharge at interpolar GP.
In timing t 5, the period Tid that rests terminates.In timing t 5～t8, carry out and timing t 1～t4
In process identical process.
As it has been described above, in embodiment 1, in wire discharge processing apparatus 1, control
The on/off action control of switch portion 20 is by portion 40 processed: from being adjusted to the first impedance
Pulse voltage generating unit 10 applies the first DC pulse voltage V1 to interpolar GP, to interpolar
After GP applies the first DC pulse voltage V1, detected portion 30 detects the situation of pre-arcing
Under, in order to interpolar GP produce main discharge and from being adjusted to second impedance lower than the first impedance
Pulse voltage generating unit 10 apply the second DC pulse voltage V2 to interpolar GP, from
Two DC pulse voltage V2 terminate to play till next first DC pulse voltage V1 starts
Rest in period Tid, produce from the pulse voltage being adjusted to the 3rd impedance higher than the first impedance
Life portion 10 is applied more than to interpolar GP or is equal to the 3rd direct current arteries and veins of electrical discharge arc voltage Vark
Rush voltage V3.I.e., it is possible to utilize and rest the 3rd DC pulse voltage V3 in period Tid
Applying, apply to be charged to by interpolar GP before the first DC pulse voltage V1 more than or
Equal to arc potential Vark, or can be micro-by produced by the 3rd DC pulse voltage V3
The state of interpolar GP is remained stable by weak discharge, it is thus possible to lure the most at short notice
Send out the pre-arcing caused by the first DC pulse voltage V1, by increasing capacitance it is possible to increase discharge frequency.Its knot
Really, it is possible to increase pre-arcing and main discharge are repeated to carry out processing speed during electro-discharge machining
Degree.
Additionally, be shown in the most illustratively rest period Tid first half section i.e. t3 extremely
Do not apply the 3rd DC pulse voltage V3 between t4, rest period Tid second half section i.e. t4 extremely
T5 applies the situation of the 3rd DC pulse voltage V3, but as long as being to rest period
Tid just terminate after the portion of pre-arcing that caused by the first DC pulse voltage V1 of t5 induction
Between by stages, then the applying of the 3rd DC pulse voltage V3 can also rest in period Tid
During other part.For example, it is possible to rest period Tid first half section to stop at t3
Between t4, start the applying of the 3rd DC pulse voltage V3, rest the later half of period Tid
Section to stop at the applying terminating the 3rd DC pulse voltage V3 between t4 to t5.
Additionally, in fig. 2, the first DC pulse voltage V1, the second DC pulse voltage
The polarity of V2 and the 3rd DC pulse voltage V3 is all set to same direction but it also may
Only change DC pulse voltage V1 polarity, only change DC pulse voltage V2 polarity,
Only change the polarity of DC pulse voltage V3 or change the polarity of multiple DC pulse voltage.
Embodiment 2
Then, use Fig. 3 that the wire discharge processing apparatus involved by embodiment 2 is described
100.Fig. 3 is the figure of the structure representing wire discharge processing apparatus 100.Below with reality
Illustrate centered by executing the part that mode 1 is different.
In embodiment 1, prepare three kinds of dc source V1～V3, by selecting any one
Produce three kinds of DC pulse voltage V1～V3, and in embodiment 2, use two kinds directly
Stream power supply V1, V2, by the change of oscillation control method, replace institute with dc source V1
State dc source V3, thus produce three kinds of DC pulse voltage V1～V3 '.
Specifically, as it is shown on figure 3, wire discharge processing apparatus 100 replaces pulse
Voltage generation part 10 and switch portion 20 (with reference to Fig. 1), possess pulse voltage generating unit 110
And switch portion 120.Pulse voltage generating unit 110 does not have the 3rd power supply 13 (with reference to Fig. 1).
Switch portion 120 does not have the 3rd switch portion 23 (with reference to Fig. 1), replaces the first switch portion 21
And there is the first switch portion 121.First switch portion 121 has multiple switch element S11～S14.
Multiple switch element S11～S14 such as between the first power supply 11 and interpolar GP full-bridge be connected.
That is, wire discharge processing apparatus 100 is from wire discharge processing apparatus 1 (reference
Eliminate the 3rd power supply 13 and the structure of the 3rd switch portion 23 in Fig. 1), utilize first to open
The change of the oscillation control method in pass portion 121, is used as to substitute by the 3rd DC pulse voltage V3 '
Product, it is possible to reduce circuit scale.
Specifically, as shown in Figure 4, the 3rd DC pulse voltage V3 ' is set to periodically
The burst of pulses of ground on-off repeatedly.Thereby, it is possible to use dc source V1 and made
For time effective amplitude after average, there is the 3rd DC pulse voltage V3 with embodiment 1
3rd DC pulse voltage V3 ' (burst of pulses) of amplitude of equal value, it is possible to realize and embodiment party
The effect that formula 1 is same.
It addition, the advantage that the 3rd DC pulse voltage V3 ' is set to burst of pulses shape is, by
The arc current from main discharge is extended in the applying of the 3rd DC pulse voltage V3 '
In the case of, by during the disconnection in burst of pulses can breaking arc electric current, therefore, it is possible to alleviate
The heating of line electrode E, it is possible to the broken string of suppression line electrode E, it is thus possible to improve further
Working (machining) efficiency.
It addition, the switch element S11 of the first switch portion 121 in present embodiment～S14 structure
Become full-bridge circuit, if connect the first diagonal angle brachium pontis (switch element S11, S14) with selecting a property
With the second diagonal angle brachium pontis (switch element S12, S13), then can change and execute to interpolar GP
The polarity of the DC pulse voltage added.
Such as, polarity and the first DC pulse voltage V1 of the 3rd DC pulse voltage V3 ' are made
Polarity and the polarity of the second DC pulse voltage V2 compare reversion, and execute to interpolar GP
Add.Such as, in the timing t 11～t12 that the first DC pulse voltage V1 should be applied to interpolar GP
Period, ON switch element S11, S14, should by the 3rd DC pulse voltage V3 ' to
The period of the timing t 14～t15 that interpolar GP applies, intermittently on/off switch element
S12、S13.Thereby, it is possible to make the electrostatic force of interpolar GP invert, make as non-rigid
The line electrode E vibration of body, it is possible to promote the generation of weak discharge further.
As it has been described above, in embodiment 2, control portion 40 by the connection of switch portion 120/
Disconnection action control is, applies the 3rd DC pulse voltage V3 ' with burst of pulses shape to interpolar GP.
That is, by DC pulse voltage is set to burst of pulses such that it is able to prevent rising edge drastically,
Voltage value can be obtained relatively low when normal, it is possible to induce by producing faint electric discharge
Thereafter the pre-arcing caused by the first DC pulse voltage V1, it is possible to lifting discharge frequency,
Improve process velocity.It addition, do not cut off at the arc current caused by main discharge halfway and
In the case of being constant flow, it is possible to cut off during the disconnection of burst of pulses, it is thus possible to alleviate
The heating of line electrode E, it is possible to the broken string of suppression line electrode E.
It addition, in embodiment 2, control portion 40 such as by the connection of switch portion 120/
Disconnection action control is, makes polarity and first DC-pulse of the 3rd DC pulse voltage V3 '
The polarity of pressure V1 and the polarity of the second DC pulse voltage V2 are compared and are inverted.Thus,
The electrostatic force that can make interpolar GP inverts, and utilizes electrostatic attraction or reaction force to make line
Electrode E vibrates, it is possible to make the distance of interpolar GP change, it is thus possible to promote faint further
The generation of electric discharge.It addition, it is effective to improving machining shape.
Additionally, the on/off action control of switch portion 120 can also be by control portion 40,
After the 3rd DC pulse voltage V3 ' applying burst of pulses shape, detect according to by test section 30
The voltage level of the rising edge gone out, does not rises to be more than or equal at voltage to the appointment time
In the case of electrical discharge arc current potential Vark, extend the burst of pulses of the 3rd DC pulse voltage V3 '
Disconnection during or the applying of stop pulse.
Such as, the interpolar produced by the 3rd DC pulse voltage V3 ' is monitored by test section 30
The magnitude of voltage of GP, at interpolar GP to the secondary turn-on time in burst of pulses
Voltage never rise to arc voltage in the case of, by extend third time connect after disconnection
Time, it is possible to breaking arc electric current more reliably.It addition, extremely through the connection of the 4th time
In the case of till between, the voltage of interpolar GP does not rises to arc voltage, it is also possible to stop pulse
The applying of voltage.Thereby, it is possible to be completely cut off arc current, it is possible to avoid line electrode E
Broken string.
That is, in the case of voltage does not rise to more than or equal to arc voltage Vark, become
The state of arc current constant flow or interpolar GP for being caused by the main discharge before tight are short
The state on road, the most any situation, line electrode E can be drawn due to the voltage applied
Rise short circuit current and generate heat, promote line electrode E to break, therefore in the situation of this state
Under, during first extending the disconnection of burst of pulses, in the case of this state eliminates not yet behind,
Can be by stopping the applying of burst of pulses voltage, the broken string of suppression line electrode E.
It addition, in the structure shown in Fig. 3, it is also possible to it is multiple switch element S11～S14
Formed by wide band gap semiconducter respectively.As wide band gap semiconducter, such as, can use and include carbon
The semiconductor of at least one in SiClx, gallium nitrate kind material or diamond.By respectively by width
Gap semiconductor forms multiple switch element S11～S14, it is possible to the switch motion making burst of pulses is high
Speedization, is especially extending in the case of the arc current of main discharge, can play utilization
The effect of breaking arc electric current during disconnection in burst of pulses.Further, since switch element is low
Connect resistance, effective to the life-span improving element.
That is, by using wide band gap semiconducter, it is possible to make switch motion high speed, especially,
The arc current realized during the disconnection utilizing burst of pulses under above-mentioned state is cut off effectively.Separately
Outward, due to low on-resistance, also effective to the pressure life-span of switch element.
Industrial applicibility
As it has been described above, line electrode is discharged by wire discharge processing apparatus involved in the present invention
It is machined with use.
The explanation of label
1,100 wire discharge processing apparatus, 10,110 pulse voltage generating units, 11
One power supply, 12 second sources, 13 the 3rd power supplys, 20,120 switch portion, 21,121
One switch portion, 22 second switch portions, 23 the 3rd switch portion, 30 test sections, 40 control
Portion.
Claims (4)
1. a wire discharge processing apparatus, it is characterised in that possess:
Pulse voltage generating unit, it has multiple power supply, and generation should be at line electrode and processed
The DC pulse voltage that interpolar between thing applies；
Switch portion, it selects power supply to adjust described pulse voltage and produce from the plurality of power supply
The impedance in life portion, on/off applies from selected power supply to the voltage of described interpolar；
Test section, it detects the discharge condition of described interpolar；And
Control portion, the on/off action control of described switch portion is by it, from being adjusted to
The described pulse voltage generating unit of one impedance applies the first DC pulse voltage to described interpolar,
Pre-putting is detected by described test section after described interpolar applies described first DC pulse voltage
In the case of electricity, in order to described interpolar produce main discharge and from being adjusted to than described first impedance
The described pulse voltage generating unit of the second low impedance applies the second DC pulse to described interpolar
Voltage, is terminating to play next described first DC pulse from described second DC pulse voltage
Voltage start till rest in period, from being adjusted to threeth impedance higher than described first impedance
Described pulse voltage generating unit be applied more than to described interpolar or equal to electrical discharge arc voltage
3rd DC pulse voltage,
Described first DC pulse voltage has amplitude and the time width producing pre-arcing,
The on/off action control of described switch portion is by described control portion, with burst of pulses shape
Apply described 3rd DC pulse voltage to described interpolar, make described 3rd direct current of burst of pulses shape
The polarity of the polarity of pulse voltage and described first DC pulse voltage and described second direct current
The polarity of pulse voltage compares reversion, and the burst of pulses of described 3rd DC pulse voltage time
Between average after exhausted than the amplitude of described first DC pulse voltage of the absolute value of effective amplitude
Little and less than the absolute value of the amplitude of described second DC pulse voltage to value.
Wire discharge processing apparatus the most according to claim 1, it is characterised in that
The on/off action control of described switch portion is by described control portion, rests period described
During the interior part that can induce the pre-arcing produced by described first DC pulse voltage,
Described 3rd DC pulse voltage is applied to described interpolar with burst of pulses shape.
Wire discharge processing apparatus the most according to claim 1, it is characterised in that
The on/off action control of described switch portion is by described control portion, is applying burst of pulses shape
Described 3rd DC pulse voltage after, according to the electricity of the rising edge detected by described test section
Voltage level, does not rises to more than or equal to electrical discharge arc current potential at voltage to the appointment time
In the case of, during the disconnection of the burst of pulses extending described 3rd DC pulse voltage or stop
The applying of pulse.
Wire discharge processing apparatus the most according to claim 3, it is characterised in that
Described switch portion has multiple switch element,
The plurality of switch element is formed by wide band gap semiconducter respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/078071 WO2014068684A1 (en) | 2012-10-30 | 2012-10-30 | Wire electrical discharge machining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104755214A CN104755214A (en) | 2015-07-01 |
| CN104755214B true CN104755214B (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280076579.9A Active CN104755214B (en) | 2012-10-30 | 2012-10-30 | Wire discharge processing apparatus |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9446465B2 (en) |
| JP (1) | JP5409964B1 (en) |
| CN (1) | CN104755214B (en) |
| DE (1) | DE112012006918B4 (en) |
| WO (1) | WO2014068684A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5968565B1 (en) * | 2015-03-17 | 2016-08-10 | 三菱電機株式会社 | EDM machine |
| CN207026653U (en) * | 2016-08-31 | 2018-02-23 | 山东豪迈机械科技股份有限公司 | Electrical discharge machining pulse power and processing unit (plant) |
| JP6360212B1 (en) * | 2017-01-31 | 2018-07-18 | ファナック株式会社 | Wire electric discharge machine |
| DE112017005583B4 (en) * | 2017-04-11 | 2020-10-08 | Mitsubishi Electric Corporation | Power supply control device for an electrical discharge machine |
| JP6770041B2 (en) * | 2018-10-23 | 2020-10-14 | ファナック株式会社 | Wire electric discharge machine and electric discharge machining method |
| JP7237254B1 (en) * | 2022-05-18 | 2023-03-10 | 三菱電機株式会社 | Electric discharge machining power supply, electric discharge machine and electric discharge machining method |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61293717A (en) | 1985-06-21 | 1986-12-24 | Hitachi Ltd | Electric discharge machine |
| JPS62287917A (en) | 1986-06-03 | 1987-12-14 | Mitsubishi Electric Corp | Electric discharge machinine |
| JPH089125B2 (en) | 1988-03-11 | 1996-01-31 | 日立精工株式会社 | Power supply for electrical discharge machining |
| US5317122A (en) | 1992-01-28 | 1994-05-31 | Mitsubishi Denki Kabushiki Kaisha | Discharge-processing electric power-source assembly |
| US5416290A (en) * | 1992-10-08 | 1995-05-16 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge machine power supply circuit |
| JP3057953B2 (en) * | 1993-02-25 | 2000-07-04 | 株式会社ソディック | Wire cut electric discharge machine |
| JP3344148B2 (en) * | 1995-03-27 | 2002-11-11 | 三菱電機株式会社 | Electric discharge machine |
| JP3627084B2 (en) | 1997-02-28 | 2005-03-09 | 三菱電機株式会社 | Electric discharge machine power supply |
| JP2001157921A (en) | 1999-11-29 | 2001-06-12 | Mitsubishi Electric Corp | Electric discharge machining apparatus |
| US6756557B1 (en) * | 2000-10-20 | 2004-06-29 | Mitsubishi Denki Kabushiki Kaisha | Power supply for wire electric discharge machining |
| JP4437612B2 (en) * | 2000-11-21 | 2010-03-24 | 三菱電機株式会社 | EDM machine |
| WO2002102538A1 (en) | 2001-06-15 | 2002-12-27 | Mitsubishi Denki Kabushiki Kaisha | Wire electric-discharge machining method and device |
| JP4042485B2 (en) | 2002-07-16 | 2008-02-06 | 三菱電機株式会社 | EDM method |
| JP3776103B2 (en) | 2002-12-19 | 2006-05-17 | 松下電器産業株式会社 | Semiconductor device and sustain circuit |
| JP2004289935A (en) | 2003-03-20 | 2004-10-14 | Sumitomo Electric Ind Ltd | Inverter |
| JP2005297164A (en) * | 2004-04-15 | 2005-10-27 | Mitsubishi Electric Corp | Electrical discharge machining device |
| US7554220B2 (en) * | 2004-07-19 | 2009-06-30 | The Kansai Electric Power Co., Inc. | Stable power supplying apparatus |
| EP1952928A4 (en) | 2005-11-16 | 2010-01-13 | Mitsubishi Electric Corp | Wire electrical discharge machining method, semiconductor wafer manufacturing method and solar battery cell manufacturing method |
| DE112008003662B4 (en) | 2008-01-31 | 2015-05-21 | Mitsubishi Electric Corp. | Electric discharge machining apparatus and electric discharge machining method |
| US20100294743A1 (en) * | 2008-01-31 | 2010-11-25 | Mitsubishi Electric Corporation | Electric discharge device |
| JP5264788B2 (en) | 2008-01-31 | 2013-08-14 | 三菱電機株式会社 | EDM machine |
| TWI343847B (en) * | 2008-08-08 | 2011-06-21 | Ind Tech Res Inst | Self-tuning power control method and device for discharge machining power system |
| JP5372095B2 (en) * | 2011-09-22 | 2013-12-18 | 三菱電機株式会社 | EDM machine |
-
2012
- 2012-10-30 WO PCT/JP2012/078071 patent/WO2014068684A1/en active Application Filing
- 2012-10-30 JP JP2013513892A patent/JP5409964B1/en active Active
- 2012-10-30 CN CN201280076579.9A patent/CN104755214B/en active Active
- 2012-10-30 US US14/420,403 patent/US9446465B2/en not_active Expired - Fee Related
- 2012-10-30 DE DE112012006918.8T patent/DE112012006918B4/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE112012006918B4 (en) | 2020-07-02 |
| DE112012006918T5 (en) | 2015-06-03 |
| CN104755214A (en) | 2015-07-01 |
| US9446465B2 (en) | 2016-09-20 |
| JPWO2014068684A1 (en) | 2016-09-08 |
| WO2014068684A1 (en) | 2014-05-08 |
| JP5409964B1 (en) | 2014-02-05 |
| US20150217390A1 (en) | 2015-08-06 |
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